Department of Oral Surgery, Birmingham Dental Hospital, Birmingham Community Healthcare NHS Trust, Birmingham, United Kingdom.
Oral Surg Oral Med Oral Pathol Oral Radiol. 2013 Nov;116(5):e303-10. doi: 10.1016/j.oooo.2011.11.037. Epub 2012 Jul 3.
The aim of this study was to evaluate the applicability and limitations of a novel atraumatic extraction system.
Seventy-two patients with severely decayed teeth or root remnants not suitable for forceps extraction were consecutively recruited and had 111 teeth extracted with the use of a novel atraumatic vertical extraction system (Benex). Various patient, tooth, and procedure data were recorded and analyzed.
Overall, 92 out of 111 teeth (83%) were successfully extracted. The success rate was higher in single-rooted teeth (89%) and lower in multirooted teeth (43%), with a risk ratio for failure of multirooted versus single-rooted teeth of 5.2 (95% confidence interval 2.5-10.7). The majority of failures were characterized by insufficient retention of the screw and/or root fracture, which mainly occurred as a result of caries in the root canal, misplacement/misalignment of the screw by the surgeon, or a fracture of the root in response to drilling and/or moderate input of traction force.
The Benex extractor system may be successfully used for atraumatic tooth extraction. The system has a higher success rate with single-rooted teeth compared with multirooted teeth. Extraction failure is mostly associated with insufficient retention or misplacement of the screw and root fracture.
本研究旨在评估一种新型无创拔牙系统的适用性和局限性。
连续招募了 72 名患有严重龋齿或不适合使用钳子拔牙的残根的患者，使用新型无创垂直拔牙系统（Benex）拔出 111 颗牙齿。记录并分析了各种患者、牙齿和手术数据。
总体而言，111 颗牙齿中有 92 颗（83%）成功拔出。单根牙的成功率较高（89%），多根牙的成功率较低（43%），多根牙失败的风险比单根牙高 5.2（95%置信区间 2.5-10.7）。大多数失败的特点是螺丝固定不足和/或牙根断裂，主要是由于根管龋齿、医生放置/对准螺丝不当或在钻孔和/或适度牵引过程中牙根断裂。
Benex 拔牙器系统可成功用于无创拔牙。与多根牙相比，该系统在单根牙中的成功率更高。拔牙失败主要与螺丝固定不足或放置不当以及牙根断裂有关。
